Literature DB >> 10931568

RF transmit power limit for the barewire loopless catheter antenna.

C J Yeung1, E Atalar.   

Abstract

The safety of the barewire loopless catheter antenna in transmit mode is addressed with respect to radiofrequency (RF) heating. Analytical expressions for electric field and specific absorption rate (SAR) distributions surrounding the antenna are postulated and experimentally verified. Limiting RF transmit power to 40-70 mW time-averaged power, depending on the specific antenna design, will ensure that the current regulatory guideline of SAR of 8 W/kg in any gram of tissue is not exceeded. These limits can act as guidelines for the design of RF pulses for use with this device. Further study is required to examine the safety of the antenna in receive mode.

Mesh：

Year:  2000        PMID： 10931568     DOI： 10.1002/1522-2586(200007)12:1<86::aid-jmri10>3.0.co;2-#

Source DB:  PubMed          Journal:  J Magn Reson Imaging        ISSN： 1053-1807            Impact factor:   4.813


  12 in total

1.  Catheter-based endomyocardial injection with real-time magnetic resonance imaging.

Authors:  Robert J Lederman; Michael A Guttman; Dana C Peters; Richard B Thompson; Jonathan M Sorger; Alexander J Dick; Venkatesh K Raman; Elliot R McVeigh
Journal:  Circulation       Date:  2002-03-19       Impact factor: 29.690

2.  RF Heating of MRI-Assisted Catheter Steering Coils for Interventional MRI.

Authors:  Fabio Settecase; Steven W Hetts; Alastair J Martin; Timothy P L Roberts; Anthony F Bernhardt; Lee Evans; Vincent Malba; Maythem Saeed; Ronald L Arenson; Walter Kucharzyk; Mark W Wilson
Journal:  Acad Radiol       Date:  2010-11-13       Impact factor: 3.173

3.  Steerable catheter microcoils for interventional MRI reducing resistive heating.

Authors:  Anthony Bernhardt; Mark W Wilson; Fabio Settecase; Leland Evans; Vincent Malba; Alastair J Martin; Maythem Saeed; Timothy P L Roberts; Ronald L Arenson; Steven W Hetts
Journal:  Acad Radiol       Date:  2010-11-13       Impact factor: 3.173

Review 4.  Real-time, Interactive MRI for cardiovascular interventions.

Authors:  Elliot R McVeigh; Michael A Guttman; Peter Kellman; Amish N Raval; Robert J Lederman
Journal:  Acad Radiol       Date:  2005-09       Impact factor: 3.173

5.  SAR and temperature: simulations and comparison to regulatory limits for MRI.

Authors:  Zhangwei Wang; James C Lin; Weihua Mao; Wanzhan Liu; Michael B Smith; Christopher M Collins
Journal:  J Magn Reson Imaging       Date:  2007-08       Impact factor: 4.813

Review 6.  Stem cell therapy: MRI guidance and monitoring.

Authors:  Dara L Kraitchman; Wesley D Gilson; Christine H Lorenz
Journal:  J Magn Reson Imaging       Date:  2008-02       Impact factor: 4.813

7.  The performance of interventional loopless MRI antennae at higher magnetic field strengths.

Authors:  AbdEl-Monem M El-Sharkawy; Di Qian; Paul A Bottomley
Journal:  Med Phys       Date:  2008-05       Impact factor: 4.071

Review 8.  MRI in guiding and assessing intramyocardial therapy.

Authors:  M Saeed; D Saloner; O Weber; A Martin; C Henk; C Higgins
Journal:  Eur Radiol       Date:  2005-01-29       Impact factor: 5.315

9.  Magnetic resonance fluoroscopy allows targeted delivery of mesenchymal stem cells to infarct borders in Swine.

Authors:  Alexander J Dick; Michael A Guttman; Venkatesh K Raman; Dana C Peters; Breno S S Pessanha; Jonathan M Hill; Scott Smith; Greig Scott; Elliot R McVeigh; Robert J Lederman
Journal:  Circulation       Date:  2003-12-01       Impact factor: 29.690

10.  A 20-gauge active needle design with thin-film printed circuitry for interventional MRI at 0.55T.

Authors:  Dursun Korel Yildirim; Christopher Bruce; Dogangun Uzun; Toby Rogers; Kendall O'Brien; Rajiv Ramasawmy; Adrienne Campbell-Washburn; Daniel A Herzka; Robert J Lederman; Ozgur Kocaturk
Journal:  Magn Reson Med       Date:  2021-04-16       Impact factor: 3.737
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